[PATCH 13/17] mmc: rockchip_sdhci: Add support for RK3588
Jonas Karlman
jonas at kwiboo.se
Mon Apr 3 22:48:28 CEST 2023
Add support for RK3588 to the sdhci driver. RK3588 has the inverter flag
in TXCLK reg instead of RXCLK and also make use of a new CMDOUT reg.
Add and use a quirks field to support such quirks.
Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
drivers/mmc/rockchip_sdhci.c | 62 ++++++++++++++++++++++++++++++++++--
1 file changed, 59 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
index 12a616d3dfb8..9178bc00b6b8 100644
--- a/drivers/mmc/rockchip_sdhci.c
+++ b/drivers/mmc/rockchip_sdhci.c
@@ -56,6 +56,7 @@
#define DWCMSHC_EMMC_DLL_RXCLK 0x804
#define DWCMSHC_EMMC_DLL_TXCLK 0x808
#define DWCMSHC_EMMC_DLL_STRBIN 0x80c
+#define DWCMSHC_EMMC_DLL_CMDOUT 0x810
#define DWCMSHC_EMMC_DLL_STATUS0 0x840
#define DWCMSHC_EMMC_DLL_STATUS1 0x844
#define DWCMSHC_EMMC_DLL_START BIT(0)
@@ -70,18 +71,28 @@
#define DLL_RXCLK_NO_INVERTER BIT(29)
#define DLL_RXCLK_ORI_GATE BIT(31)
#define DLL_TXCLK_TAPNUM_DEFAULT 0x10
+#define DLL_TXCLK_TAPNUM_90_DEGREES 0x9
#define DLL_TXCLK_TAPNUM_FROM_SW BIT(24)
+#define DLL_TXCLK_NO_INVERTER BIT(29)
#define DLL_STRBIN_TAPNUM_DEFAULT 0x4
#define DLL_STRBIN_TAPNUM_FROM_SW BIT(24)
#define DLL_STRBIN_DELAY_NUM_SEL BIT(26)
#define DLL_STRBIN_DELAY_NUM_OFFSET 16
#define DLL_STRBIN_DELAY_NUM_DEFAULT 0x10
+#define DLL_CMDOUT_TAPNUM_90_DEGREES 0x8
+#define DLL_CMDOUT_TAPNUM_FROM_SW BIT(24)
+#define DLL_CMDOUT_SRC_CLK_NEG BIT(28)
+#define DLL_CMDOUT_EN_SRC_CLK_NEG BIT(29)
+#define DLL_CMDOUT_BOTH_CLK_EDGE BIT(30)
#define DLL_LOCK_WO_TMOUT(x) \
((((x) & DWCMSHC_EMMC_DLL_LOCKED) == DWCMSHC_EMMC_DLL_LOCKED) && \
(((x) & DWCMSHC_EMMC_DLL_TIMEOUT) == 0))
#define ROCKCHIP_MAX_CLKS 3
+#define QUIRK_INVERTER_FLAG_IN_RXCLK BIT(0)
+#define QUIRK_HAS_DLL_CMDOUT BIT(1)
+
struct rockchip_sdhc_plat {
struct mmc_config cfg;
struct mmc mmc;
@@ -99,6 +110,7 @@ struct rockchip_sdhc {
void *base;
struct rockchip_emmc_phy *phy;
struct clk emmc_clk;
+ u8 txclk_tapnum;
};
struct sdhci_data {
@@ -144,6 +156,8 @@ struct sdhci_data {
* Return: 0 if successful, -ve on error
*/
int (*set_enhanced_strobe)(struct sdhci_host *host);
+
+ u32 quirks;
};
static void rk3399_emmc_phy_power_on(struct rockchip_emmc_phy *phy, u32 clock)
@@ -294,6 +308,10 @@ static void rk3568_sdhci_set_clock(struct sdhci_host *host, u32 div)
static int rk3568_sdhci_config_dll(struct sdhci_host *host, u32 clock, bool enable)
{
+ struct rockchip_sdhc *priv = container_of(host, struct rockchip_sdhc, host);
+ struct sdhci_data *data = (struct sdhci_data *)dev_get_driver_data(priv->dev);
+ struct mmc *mmc = host->mmc;
+ u8 txclk_tapnum = DLL_TXCLK_TAPNUM_DEFAULT;
int val, ret;
u32 extra;
@@ -318,12 +336,33 @@ static int rk3568_sdhci_config_dll(struct sdhci_host *host, u32 clock, bool enab
if (ret)
return ret;
- extra = DWCMSHC_EMMC_DLL_DLYENA | DLL_RXCLK_NO_INVERTER;
+ extra = DWCMSHC_EMMC_DLL_DLYENA | DLL_RXCLK_ORI_GATE;
+ if (data->quirks & QUIRK_INVERTER_FLAG_IN_RXCLK)
+ extra |= DLL_RXCLK_NO_INVERTER;
sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK);
+ if (mmc->selected_mode == MMC_HS_200 ||
+ mmc->selected_mode == MMC_HS_400 ||
+ mmc->selected_mode == MMC_HS_400_ES)
+ txclk_tapnum = priv->txclk_tapnum;
+
+ if ((data->quirks & QUIRK_HAS_DLL_CMDOUT) &&
+ (mmc->selected_mode == MMC_HS_400 ||
+ mmc->selected_mode == MMC_HS_400_ES)) {
+ txclk_tapnum = DLL_TXCLK_TAPNUM_90_DEGREES;
+
+ extra = DLL_CMDOUT_SRC_CLK_NEG |
+ DLL_CMDOUT_BOTH_CLK_EDGE |
+ DWCMSHC_EMMC_DLL_DLYENA |
+ DLL_CMDOUT_TAPNUM_90_DEGREES |
+ DLL_CMDOUT_TAPNUM_FROM_SW;
+ sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_CMDOUT);
+ }
+
extra = DWCMSHC_EMMC_DLL_DLYENA |
- DLL_TXCLK_TAPNUM_DEFAULT |
- DLL_TXCLK_TAPNUM_FROM_SW;
+ DLL_TXCLK_TAPNUM_FROM_SW |
+ DLL_TXCLK_NO_INVERTER |
+ txclk_tapnum;
sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK);
extra = DWCMSHC_EMMC_DLL_DLYENA |
@@ -339,6 +378,8 @@ static int rk3568_sdhci_config_dll(struct sdhci_host *host, u32 clock, bool enab
sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_CTRL);
sdhci_writel(host, DLL_RXCLK_ORI_GATE, DWCMSHC_EMMC_DLL_RXCLK);
sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
+ if (data->quirks & QUIRK_HAS_DLL_CMDOUT)
+ sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CMDOUT);
/*
* Before switching to hs400es mode, the driver will enable
* enhanced strobe first. PHY needs to configure the parameters
@@ -573,6 +614,9 @@ static int rockchip_sdhci_of_to_plat(struct udevice *dev)
if (ret)
return ret;
+ priv->txclk_tapnum = dev_read_u8_default(dev, "rockchip,txclk-tapnum",
+ DLL_TXCLK_TAPNUM_DEFAULT);
+
return 0;
}
@@ -594,6 +638,14 @@ static const struct sdhci_data rk3568_data = {
.set_ios_post = rk3568_sdhci_set_ios_post,
.set_clock = rk3568_sdhci_set_clock,
.config_dll = rk3568_sdhci_config_dll,
+ .quirks = QUIRK_INVERTER_FLAG_IN_RXCLK,
+};
+
+static const struct sdhci_data rk3588_data = {
+ .set_ios_post = rk3568_sdhci_set_ios_post,
+ .set_clock = rk3568_sdhci_set_clock,
+ .config_dll = rk3568_sdhci_config_dll,
+ .quirks = QUIRK_HAS_DLL_CMDOUT,
};
static const struct udevice_id sdhci_ids[] = {
@@ -605,6 +657,10 @@ static const struct udevice_id sdhci_ids[] = {
.compatible = "rockchip,rk3568-dwcmshc",
.data = (ulong)&rk3568_data,
},
+ {
+ .compatible = "rockchip,rk3588-dwcmshc",
+ .data = (ulong)&rk3588_data,
+ },
{ }
};
--
2.40.0
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